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authorTejun Heo <tj@kernel.org>2008-09-03 10:09:47 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-09-03 22:58:53 -0400
commitce36394269ccd9d1d286d6192ba09fa6894365e9 (patch)
treefb235ff6ea1363ae4fd933e29268e76cdade5682 /sound/isa/ad1848
parentd210baf53b699fc61aa891c177b71d7082d3b957 (diff)
mmap: fix petty bug in anonymous shared mmap offset handling
Anonymous mappings should ignore offset but shared anonymous mapping forgot to clear it and makes the following legit test program trigger SIGBUS. #include <sys/mman.h> #include <stdio.h> #include <errno.h> #define PAGE_SIZE 4096 int main(void) { char *p; int i; p = mmap(NULL, 2 * PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, PAGE_SIZE); if (p == MAP_FAILED) { perror("mmap"); return 1; } for (i = 0; i < 2; i++) { printf("page %d\n", i); p[i * 4096] = i; } return 0; } Fix it. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Hugh Dickins <hugh@veritas.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'sound/isa/ad1848')
0 files changed, 0 insertions, 0 deletions